Learning Forum

[Albi.Pani]

Hi, in one of my simulation I am using "grating_s_parameters" function and many time it worked ok. But some time it gives me this error:

 Can not find result 'S_polarization' in the result provider 'grating_s_parameters'

I have tried to figure out the origin of this problem but I still don't know, have you any suggestions?

[Amrita Pati]

Hi,

I believe S-polarization is relevant only when you expect the metamaterial to cause polarization rotation. For instance, if the input is s-polarized and the output light is s-polarized then only the "S" result should suffice. But if the input is s-polarized but the output is a combination of both s and p then the "S-polarization" result is relevant. For more information, please refer to: Metamaterial S parameter extraction.

It is possible that for some reason this result is not being calculated because of an error.

Go to the Analysis tab of the grating_s_params object, and click on Run Analysis. If there is any error, you should see them appear in red font in the same screen.

Regards,
Amrita

[Albi.Pani]

Hi Amrita, thank you for the answer.

I have tried to run the analysis and the error is:

Error: prompt line 202: in expression A(i,...) the indices were out of range

Error: Result S: variable not found.

Error: Result S_polarization: variable not found

Have you any suggestions? I don't know what indeces it is talking about. 

[Amrita Pati]

You are welcome! Now if you go to the Script Tab in the Analysis Tab, then you will see the code that is used for calculating "S" and "S-polarization" results.

You can get line numbers that are causing the errors. Find these lines in the Script tab and try to identify what is causing the error.

Regards,
Amrita